Windmill



0. BOTT WINDMILL Filed Jan. 30. 1925 2 Sheets-Sheet 1 lllllllllh "'Hllllll" IIIIIIHH' 'III Jan 1, 1

O, BOTT WINDMILL Fil ed Jan. so. 1925 2 Sheets-Sheet 'a f atented .Fan. 1, 1924.

OTTO BOTT, OF OSHKOSH, NEBRASKA.

WINDMILL.

Application filed January 30, 1923. Serial No. 615,807.

To all whom it may concern:

Be it known that I, OTTO BOTT, a citizen of the United States, residing at Oshkosh, county of Garden and State of Nebraska,

have invented certain new and useful Improvements in Windmills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refer ence being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification. v

This invention relates to windmills of the type employed for pumping water.

It is the object of this invention to pro duce a new and improved type of windmill which shall not be so liable to be injured by wind storms,'and which shall be of simple and substantial construction.

In order to describe my invention so that the same may be clearly understood, I shall have reference to the accompanying drawing, in which:

Fig. 1 is a side elevation of the improved mechanism of my windmill with a small portion thereof broken away.

Fig. 2 is a top plan view of my windmill showing the parts in neutral position, parts thereof being broken away to better show the construction.

Fig. 3 is a section taken on line 35, Fig. 1.

Fig. 1 is a view similar to that in Fig. 2, but showing the parts in operative position.

Fig. 5 is a section taken on line 5-5, Fig. 1; and

Figs. 6 and 7 are sections taken on line 66, Fig. 1 and shows two successive pos tions of the means for throwing the mechanism into operative position.

The same reference numbers will be used to designate the same parts throughout the several views.

Numeral 1 represents the upper part of the supporting tower upon which my windmill rests and which has on its upper surface a raceway 2 for the reception of balls 3 upon which the turntable 4.- rests. On one side of the center the turntable is provided with a U-shaped bracket 5 between whichis journaled an arm 6. The arm 6 has a transverse hub 7 A shaft 8, indicated by dotted lines in Fig. 1, extends through the hub 7 and through the two parallel sides of the U-shaped bracket 5, the upper surface of. which has a hub 9 which extends upwardly for a short distance. Secured to the upper end of shaft 8 is a bevel gear 10, the pur-- pose of which will appear as the description proceeds. The arm 6 has its outer end bifur cated, and between the two parallel arms 11 and 12 is pivotally mounted a sail which consists of two rectangular members 13 and 14: having one end connected to form the vertex of a dihedral angle. The members 13 and 14 are separated by brackets 15 in the manner shown in Fig. 5. A shaft 16, passing through central openings provided therefor in the brackets 15, extends through suitable bearings near the ends of arms 11 and 12 and serves as the pivot about which the sail turns. An arm 17 is now rotatably mounted on shaft 16 and has its end connected by means of springs 18 with the ends of brackets 19 which in turn are held in adjusted position by means of rods 20. The springs 18 are so tensioned that the arm 17 will normally bisect the angle between the sides 13 and 1 1. To the upper end of shaft 16, I secure a bevel gear 21. Mounted in suitable manner on the upper ends of shafts 8 and 16 are bearings 22 and 23 respectively, which support the shaft 2 1 in the manner shown most clearly in Fig. 1. Shaft 24 has collars 25 011 one side of bearings 22 and 23 and on the other side gear wheels 26 and 27 which engage respectively the gears 10 and 21. A metal plate or platform 28 is supported from the turntable by suitable means, such as rods 29 and serves as the support for a system of bell cranks and connecting rods, which is shownin Figs. 2 and 4-, and which will now be described.

Pivoted to the upper side of the platform 28 are two bell cranks 29 and 30. One arm of crank 29 is connected by means of a rod 31 with the gear wheel 10 in such a manner that any movement of the bell crank will rotate the gear. A connecting rod 32 joins the parallel arms of the cranks 29 and 30 so that any movement of the one will be transmitted to the other. A slotted bar 38 is pivotally connected to the endof one arm of the bell crank 30 and has its other end against the ends of the slot and move the bar 33 first in one direction and then the other. Thus, when arm 6 and shaft 24E-have moved in a counter-clockwise direction to the extent shown in Fig. 4:, the bar 33 will have been moved upwardly and by its move- Inent rotated the bell cranks and the gears 10. Springs 35 are connected to the lever arms in such a manner that when the latter occupy their extreme positions in either direction, the tension of the springs will serve to prevent reversemovement until the shaft 24 strikes theopposite'end-of theslot and exerts sufiicient force to overcome the tensionolf the springs and move the bellcranks and associated parts to the opposite position from that shown in Fig. 4;.

Let us now explain the purpose and the function o1 gears 10, 2(3- and 27, 21 and shaft 24. If we suppose that the parts occupy the position shown in Fig. land that the wind blows in the direction of the arrows A, the reaction of the wind, as it strikes the sides of the plate 1st, will produce a resultant force that will tend to move the. arm 6-and attached parts'in a clockwise direction. The-gear 10'is held from rota tionby rod 31 and the action of the springs 35. As a result ofthis, the'gears 26 will lee forced to rotate and this in turnwill The parts are'so proportioned that the angle that the sides of the sail makes, with respect to the wind, remains constant throughout the movement of the arm 6. Vfhenthe arm has moved in a clockwise direction until shaft 24!: strikes the other end of the slot in arm 33, the arm will-be forced to move and will oscillate the bell cranks and rotate the gear 10. As the gear 10 is rotated 1n a' clockwise direction (Fig.

4c) the sail will be oscillated about its shaft '16 to such an extent that side 13 willmake with the wind the same angle as side 14 did when the parts were in the position shown by full lines in Fig. 4c. The reaction between the wind and sail will now be such that-the resultant force will cause the parts to move backwardly 1nto the pos tion shown in Fig. l, when the bell cranks will once more be oscillated and theparts set so as 110 cause a clockwise rotation of the-arm 6 and this will continue indefinitely as long as the wind is sufficiently strong to produce the required force. V

In order to convert the oscillating movement of the arm 6 into a vertical reciproeating movement, by means of which a'pump may be operated, the following mechanical movement is provided: Referring now more particularly toFig. 3, the turntable i has a downwardly projecting tubular portion 36 which extends through a hole in the support 1. Through this opening a pump rod 37 extends downwardly to the pump. A lug 38 projectsnpwardly from the turntable 4 and serves'as the fulcrum for the bell crank lever 39. The upper end of the pump rod is pivotally connected to the horizontal arm of the bell-crank leverin the manner shown in Fig. 3. To theupper end of the vertical arm ofthebell crank, I pivot a pitman-4O whoseother endis-provided with an opening whichencloses the arm 6. As the arm 6 oscillates about its pivot 8, it rocks the leveryarm 39 and reciprocates the pump rod 37. i g

In order tostop the operation of the windmill, I provide the following mechanism: two projections 41 and-42 whichare adapted to beengagedby a'cam 43. The cam is pivoted to. the platform and is provided with a vane 44:. AspringdStends to hold 'the vane and theeam 'in the position shown in Fig. i and may be-moved to-the position shown in Fig. 2' by a pull on the cord 46. When the cam 43 is in the position shownin Fig; ,2, the sail is held insuch a position that the wind exerts an equal force on each side, with the result that there. is no tendency folarm 6 to :move. The "position shown in Fig. 2 is-termedtheneutral'position. When the-tension in cordv 46 is released, the bell cranks are- -f ree't0-1nove,

but since the sailis in", neutral position,

there is no tendency for thepartstooscillate. In order to start the windmill, it is necessary to move the parts from neutral position and this is accomplishedby the A bar 47 is slidably. mounted in a guide l8 and carries at its'end following means a hook 49, which is adapted to engage the side of lever 30. A pull on the ropej5() will move the mechanism to. the position shown in Fig. 4cand permit the parts-xto function. A spring 51 holdsthehook'l) retracted. 1 r

In caseof astrong wind which would be liable to "cause damage, to' the me'chan-ism, the vane 4.4 will be rotatedand the cam l?) moved into neutralposition, which will-prevent thearm 6-from'oscillating. The function of the springs 18 is toact as aigovernor or regulator, as they permit the-sail' to-yield whenever the forcebeeom t o thus reducelthevaluelof the resultant force whichproduces the move t 1 V Thebell crank 30 is-provided'with It is evident that I may make the sail of any suitable size and also that I may duplicate the parts without departing from the spirit of the invention. Although I have described my mechanism as being adapted to be operated by wind power, it is evident that the same mechanism would operate in a current of water instead of air.

I am aware that many minor modifications can be made without departing from the spirit of the invention and the device shown and described is merely intended to shown one possible embodiment of my invention. I therefore desire to obtain as broad protection as the state of the, art will permit and contemplate making any changes that may be required, and which fall within the scope of the appended claims.

Having now described my invention, what I claim is:

1. In a device of the class described in combination; a turntable adapted to rotate about a vertical axis; a bracket secured to said table; an arm pivoted to said bracket and adapted to oscillate about a vertical axis; a sail pivotally connected to the free end of saidarm and adapted to be oscillated about a vertical axis so as to vary its angular relation to the arm; means for altering the angular relation of the arm and the sail as the arm oscillates about its pivot; and means for reversing the angular relation of the arm and the sail at'the end of each oscillation of the arm.

2. In a mechanism of the class described; a support; a turn-table rotatably mounted thereon; a bracket secured to said support; an arm pivotally mounted on said bracket so as to swing in a horizontal plane, the free end of said arm being bifurcated; a sail comprising two plates joined at one end and spaced at the other so as to form an acute dihedral angle, said sail being pivotally mounted between the two arms of the free end of the arm so as to oscillate about a vertical axis; a gear secured to the said bracket; a second gear inter-meshing therewith; a third gear secured to the shaft, about which the sail oscillates; a fourth gear intermeshing with the third gear; a shaft connecting said second and fourth gears; a bell crank lever; aconnecting rod between one arm of said. lever and said first gear whereby the movement of the lever will move the gear; resilient means for holding said lever in each of two extreme positions; and means comprising the said shaft for moving the lever from one extreme position to the other.

3. A windmill comprising in combination a support; a turntable rotatably mounted thereon; a bracket on one side of said turntable; vertical shaft secured to said bracket; anarm mounted on said shaft and free to rotate thereabout, the free end of said arm being bifurcated; a sail pivotally mounted in said bifurcation, said sail normally occupying an angular position with respect to the arm; means for gradually altering the angular relation of the sail and arm as the latter moves about its pivot; and means for limiting the movement of the arm in either direction, said means comprising a system of levers and rods which cooperate with the means for shifting the sail.

at. A windmill comprising in combination a support; a turntable rotatably mounted thereon; a bracket on one side of said turntable; a vertical shaft secured to said bracket; an arm mounted on said shaft and free to rotate thereabout, the free end of said arm being bifurcated; a sail pivotally mounted in said bifurcation, said sail normally occupying an angular position with respect to the arm; means for gradually altering the angular relation of the sail and arm as the latter moves about its pivot; means for limiting the movement of the arm in either direction, said means comprising a system of levers and rods which cooperate with the means for shifting the sail; and means for moving said sail into parallel relation with said arm whereby the parts will assume inoperative position.

5. A windmill comprising in combination a support; .a turntable rotatably mounted thereon; a bracket on one side of said turntable; a vertical shaft secured to said bracket; an arm mounted on said shaft and free to rotate thereabout, the free end of said arm being bifurcated; a sail pivotally mounted in said bifurcation, said sail normally occupying an angular position with respect to the arm; means for gradually.

altering the angular relation of the sail and arm as the latter moves about its pivot; means for limiting the movement of the arm in either direction, said means comprising a system of levers and rods which cooperate with the means for shifting the sail; means for moving said sail into parallel relation with said arm whereby the parts will assume inoperative position; and means for locking the parts in inoperative position.

6. A windmill comprising in combination a support; a turntable rotatably mounted thereon; a bracket on one side of said turntable; a vertical shaft secured to said bracket; an arm mounted on said shaft and free to rotate thereabout, the free end of said arm being bifurcated; a sail pivotally mounted in said bifurcation, said sail normally occupying an angular position with respect to the arm; means for gradually altering the angular relation of the sail and arm as the latter moves about its pivot; means for limiting the movement of the arm in either direction, said means comprising parts in inoperative position; anclineans for moving the parts into operative position.

In testimon;

whereof I affix my siglmtur inpresence of two Witnesses.

Witnesses J. T. SHIELDS,

Rontr.

DAY.

{OTTO eo'rr. 

